add audio-rt module to fight xruns under cpu load

EasyEffects DSP plugins (rnnoise, deepfilternet, crystalizer) drop audio
when the system is under load. Layered workaround with per-optimization
toggles for bisecting impact:

- cgroup-based CPU partitioning: dedicated audio.slice with AllowedCPUs
  pinning, restricted app/session/background slices for everything else
- rlimits so PipeWire's module-rt sets SCHED_FIFO 88 directly instead of
  going through RTKit's priority-10 ceiling
- persistent watcher that re-applies performance governor on audio cores
  (gamemoded/PPD keep resetting it)
- ananicy rule pinning easyeffects to nice -12 for non-RT DSP threads
- znver4-tuned rebuilds of easyeffects and its DSP deps

Master switch + per-feature toggles via lumpiasty.audioRt.*; all enabled
by default on acer host. None of this fully eliminates dropouts on this
thermally constrained laptop but each layer is independently testable.

This commit is contained in:

Lumpiasty

2026-05-18 17:19:04 +02:00

parent 9ea6bac4af

commit c9e6ec7b23

5 changed files with 250 additions and 2 deletions

									
										modules/default.nix
									
		+1
		
												View File
												
				@@ -20,6 +20,7 @@

				    desktop/plasma.nix

				    desktop/touchpad.nix

				    desktop/pulseaudio.nix

				    desktop/audio-rt.nix

				    desktop/tailscale.nix

				  ];

				}